The new guy is back. I have another question and my browser won't let me search all of the threads right now (weather is bad). Is the weight of the Mobile 1 4T racing oil made especially for Triumphs all 10w40? I have about 3.5 L that I got from the previous owners of my '05 T100 and can't find a weight/grade on the container. Wal Mart is currently selling Mobile 1 10w40 racing oil and 15w50 twin motorcycle oil for motorcycles at $8.65 a quart. I wanted one more quart to top off the next oil change (which will be soon) and, of course, I want the right weight. Thanks in advance for any input.